12210030221 has 2 divisors, whose sum is σ = 12210030222. Its totient is φ = 12210030220.

The previous prime is 12210030193. The next prime is 12210030223. The reversal of 12210030221 is 12203001221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11580772996 + 629257225 = 107614^2 + 25085^2 .

It is an emirp because it is prime and its reverse (12203001221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12210030221 is a prime.

Together with 12210030223, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12210030196 and 12210030205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12210030223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105015110 + 6105015111.

It is an arithmetic number, because the mean of its divisors is an integer number (6105015111).

Almost surely, 2^12210030221 is an apocalyptic number.

It is an amenable number.

12210030221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12210030221 is an equidigital number, since it uses as much as digits as its factorization.

12210030221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12210030221 its reverse (12203001221), we get a palindrome (24413031442).

The spelling of 12210030221 in words is "twelve billion, two hundred ten million, thirty thousand, two hundred twenty-one".